Went to their website accessory store and their ($39.99) HTC Thunderbolt standard battery is selling for $19.99 + tax. There was no coupon code, but you need to add it to cart and the price changes from 39.99 to 19.99 instantly. Their website also gave me free 2 day fedex shipping. I had to pay about $1.xx in taxes.
i ordered at night and got the tracking number the next morning.
take it for what it is, amazon.com is selling an oem battery from htc (should be the same?) for $15.20 + fs.